//  This file is part of Friendiqa
//  https://git.friendi.ca/lubuwest/Friendiqa
//  Copyright (C) 2017 Marco R. <thomasschmidt45@gmx.net>
//
//  This program is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  (at your option) any later version.
//
//  In addition, as a special exception, the copyright holders give
//  permission to link the code of portions of this program with the
//  OpenSSL library under certain conditions as described in each
//  individual source file, and distribute linked combinations including
//  the two.
//
//  You must obey the GNU General Public License in all respects for all
//  of the code used other than OpenSSL. If you modify file(s) with this
//  exception, you may extend this exception to your version of the
//  file(s), but you are not obligated to do so. If you do not wish to do
//  so, delete this exception statement from your version. If you delete
//  this exception statement from all source files in the program, then
//  also delete it here.
//
//  This program is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with this program.  If not, see <http://www.gnu.org/licenses/>.

import QtQuick 2.11
import QtQuick.Controls 2.4
import "qrc:/js/news.js" as Newsjs
import "qrc:/js/helper.js" as Helperjs
import "qrc:/js/service.js" as Service

StackView{
    id: newsStack
    anchors.fill: parent
    property string updateMethodNews: "refresh"
    property var allchats: ({})
    signal replySignal(var newsobject)
    property int lastnewsid:0

   function newstypeHandling(newstype){
       newsBusy.running=true;
       replySignal("");
       //messagesend.state="";
       newsModel.clear();
       switch(newstype){
       case "timeline":
           newstab.newstabstatus="Timeline";
           try{ Newsjs.newsfromdb(root.db,root.login,0, function(dbnews,lastid){
               lastnewsid=lastid;
               showNews(dbnews)
           })}catch(e){Helperjs.showMessage("Error",e,root)};
           break;
       case "conversation":
           newstab.newstabstatus="Conversations";
           Newsjs.chatsfromdb(root.db,root.login,0,function(news,lastid){
               lastnewsid=lastid;
               showNews(news)});
           break;
       case "favorites":
           newsStack.updateMethodNews="refresh";
           newstab.newstabstatus="Favorites";
           Service.updateView("Favorites");
           break;
       case "replies":
           newsStack.updateMethodNews="refresh";
           newstab.newstabstatus="Replies";
           Service.updateView("Replies");
           break;
       case "publictimeline":
           newsStack.updateMethodNews="refresh";
           newstab.newstabstatus="Public Timeline";
           Service.updateView("Public Timeline");
           break;
       case "groupnews":
           newsStack.updateMethodNews="refresh";
           Service.showGroups();
           break;
       case "search":
           newsView.anchors.topMargin=7*mm;
           newsBusy.running=false;
           var component = Qt.createComponent("qrc:/qml/genericqml/Search.qml");
           var searchItem = component.createObject(newsStack,{y:mm,width:root.width,height: 5*mm});
           break;
       case "refresh":
           if (newstab.newstabstatus=="Timeline"){
               newsStack.updateMethodNews="append"
           } else {newsStack.updateMethodNews="refresh"}
           //root.contactLoadType="news";
           if (newsSwipeview.stacktype=="Home"){
               Service.updateView(newstab.newstabstatus)
           }
           else if (newsSwipeview.stacktype=="DirectMessage"){
               Service.updateView("Direct Messages")
           }
           else if (newsSwipeview.stacktype=="Notifications"){
               Service.updateView("Notifications")
           }
           break;
       default:
           if (newstab.newstabstatus=="Timeline"){
               newsStack.updateMethodNews="append"
           } else {newsStack.updateMethodNews="refresh"}
           //root.contactLoadType="news";
           if (newsSwipeview.stacktype=="Home"){
               Service.updateView(newstab.newstabstatus)
           }
           else if (newsSwipeview.stacktype=="Directmessage"){
               Service.updateView("Direct Messages")
           }
           else if (newsSwipeview.stacktype=="Notifications"){
               Service.updateView("Notifications")
           }
       }
   }


   function showNews(newsToShow){
      try{if (newsStack.depth>1){newsStack.pop()}}catch(e){}
      newsBusy.running=false;
      var currentTime= new Date();
     // downloadNotice.text=downloadNotice.text + "\n shownews start "+ Date.now();
      //print("appendnews "+JSON.stringify(newsToShow))
      if (newsToShow.length==1){var method="refresh"}else{var method = newsStack.updateMethodNews}
      var msg = {'currentTime': currentTime, 'model': newsModel,'news':newsToShow,'method':method, 'options':globaloptions};
      newsWorker.sendMessage(msg);
      //newsStack.appendNews=false
   }

   function showContact(contact){ //print(JSON.stringify(contact));
       //newstab.newstabstatus="Contact";
       newsStack.push("qrc:/qml/newsqml/ContactPage.qml",{"contact": contact});
   }

   function search(term){//print("Search "+term)
       if (term!=""){
       newstab.newstabstatus="Search";
       newsBusy.running=true;
       newsStack.updateMethodNews="refresh";
       xhr.setLogin(login.username+":"+Qt.atob(login.password));
       xhr.setUrl(login.server);
       xhr.setApi("/api/search");
       xhr.clearParams();
       xhr.setParam("q",term)
       xhr.get();}
       newsView.anchors.topMargin=mm
   }

    function getOldNews(){
        var currentTime= new Date();
        try{var lastnews_id=newsModel.get(newsModel.count-1).newsitemobject.created_at;} catch(e){var lastnews_id=99999999999999 }
         var messagetype=0;
         switch(newsSwipeview.stacktype){
             case "Home":messagetype=0;break;
             case "DirectMessages": messagetype=1;break;
             case "Notifications":messagetype=2;break;
             case "Replies":messagetype=3;break;
             default:messagetype=0;
         }
        if(newstab.newstabstatus=="Timeline"){print("lastnewsid "+lastnews_id);
            Newsjs.newsfromdb(root.db,root.login, messagetype,function(news){
                var msg = {'currentTime': currentTime, 'model': newsModel,'news':news,'method':"", 'options':globaloptions};
                newsWorker.sendMessage(msg);
            },false,lastnews_id)}
        else if(newstab.newstabstatus=="Conversations"){
            Newsjs.chatsfromdb(root.db,root.login, messagetype,function(news){
                var msg = {'currentTime': currentTime, 'model': newsModel,'news':news,'method':"", 'options':globaloptions};
                newsWorker.sendMessage(msg);
            },lastnews_id)}
//                        else if(newstab.newstabstatus=="Contact"){
//                            Newsjs.newsfromdb(root.db,root.login, function(news){
//                                var msg = {'currentTime': currentTime, 'model': newsModel,'news':news,'appendnews':true};
//                                newsWorker.sendMessage(msg);
//                            },newsModel.get(newsModel.count-1).newsitemobject.uid,lastnews_id)}
        else if (newstab.newstabstatus=="Notifications"){}
        else{
            //newsStack.appendNews=true;
            try{xhr.setParam("max_id",newsModel.get(newsModel.count-1).newsitemobject.id-1);}catch(e){}
            xhr.get()
        }
    }
    Connections{
       target:xhr
       onError:{
           Helperjs.showMessage(qsTr("Network Error"),"API:\n" +login.server+api+"\n Return: \n"+data,root);
       }
       onSuccess:{
          // downloadNotice.text=downloadNotice.text+ "\n xhr finished "+Date.now();
           Service.processNews(api,data)
           replySignal("")
       }
   }

   Timer {id:replytimer; interval: 1000; running: false; repeat: false
       onTriggered: {
           newsBusy.running=true;
           if(newstab.newstabstatus=="Conversation"){
               showConversation(newsStack.timelineIndex-1,newsModel.get(0).newsitemobject)}
           else{
               if (newstab.newstabstatus=="Timeline"){
                   newsStack.updateMethodNews="append"
               } else {newsStack.updateMethodNews="refresh"}
               if (newsSwipeview.stacktype=="Home"){
                   Service.updateView(newstab.newstabstatus)
               }
               else if (newsSwipeview.stacktype=="DirectMessages"){
                   Service.updateView("Direct Messages")
               }
               else if (newsSwipeview.stacktype=="Replies"){
                   Service.updateView("Replies")
               }
               replySignal("")
                 //Service.updateView(newstab.newstabstatus)
           }
       }
   }

   initialItem: Rectangle {
        id:newslistRectangle
        y:1
        color: "white"
        //anchors.fill:parent

        Component {  id:footerComponent
            Rectangle{
                border.color: "#EEEEEE"
                border.width: 1
                 width:newsView.width
                 height:6*mm
                 Text{
                     font.pixelSize: 1.5*mm
                     anchors.centerIn: parent
                     text:qsTr("More")
                 }
                 MouseArea{
                     anchors.fill:parent
                     onClicked:{
                        if (newsModel.count==0){
                            if (newsSwipeview.stacktype=="Home"){
                                Service.updateView(newstab.newstabstatus)
                              }
                              else if (newsSwipeview.stacktype=="DirectMessages"){
                                  Service.updateView("Direct Messages")
                              }
                              else if (newsSwipeview.stacktype=="Notifications"){
                                  Service.updateView("Notifications")
                              }
                              else if (newsSwipeview.stacktype=="Replies"){
                                  Service.updateView("Replies")
                              }
                        }
                        else {getOldNews();}
                     }
                 }
             }
        }

        ListView {
          id: newsView
          property real oldContentY:0
          property bool viewdragged: false
          property bool viewdraggedpositive: false
          property string viewtype: "news"
          anchors.fill: parent
          anchors.margins: mm
          clip: true
          spacing: 0
          header: MessageSend{id:messagesend;onHeightChanged: newsView.positionViewAtBeginning()}
          footer: footerComponent
          model: newsModel
          delegate: Newsitem{}
          onDragStarted: oldContentY=contentY
          onDragEnded: {
              if(verticalOvershoot<-5*mm){
                viewdragged=true
              }
              else if (verticalOvershoot>5*mm){
                viewdraggedpositive=true
              }
              else{
                if((contentY-oldContentY)>15*mm){
                    swipeIndicator.visible=false;
                    newsSwipeview.height=rootStackItem.height;
                    newsSwipeview.y=0;
                    rootStackItem.state="fullscreen"
                }
                else if ((contentY-oldContentY)<-15*mm){
                    swipeIndicator.visible=true;
                    newsSwipeview.height=rootStackItem.height-12*mm;
                    newsSwipeview.y=5*mm;
                    rootStackItem.state=""
                }
              }
              }
          onViewdraggedChanged: {
              if (viewdragged){
                  var onlynew=true;
                  newsBusy.running=true;
                  viewdragged=false
                  if (newstab.newstabstatus=="Timeline"){
                      newsStack.updateMethodNews="append"
                  } else {newsStack.updateMethodNews="refresh"}
                //root.contactLoadType="news";
                  if (newsSwipeview.stacktype=="Home"){
                      Newsjs.getLastNews(root.login,root.db,function(currentlastnews){
                          if (currentlastnews>lastnewsid){
                              if(newstab.newstabstatus=="Timeline"){
                                  try{ Newsjs.newsfromdb(root.db,root.login,0, function(dbnews,lastid){
                                      lastnewsid=lastid;
                                      showNews(dbnews)
                                  })}catch(e){Helperjs.showMessage("Error",e,root)};
                              }
                              if(newstab.newstabstatus=="Conversations"){
                                  Newsjs.chatsfromdb(db,root.login,0,function(news,lastid){
                                      lastnewsid=lastid;
                                      showNews(news)});
                              }
                            }  else {
                                Service.updateView(newstab.newstabstatus)
                            }
                        });
                    }
                else if (newsSwipeview.stacktype=="DirectMessages"){
                    Service.updateView("Direct Messages")
                }
                else if (newsSwipeview.stacktype=="Notifications"){
                    Service.updateView("Notifications")
                }
                else if (newsSwipeview.stacktype=="Replies"){
                    Service.updateView("Replies")
                }

              }
          }
          onViewdraggedpositiveChanged: {
              if (viewdraggedpositive){
                getOldNews();
                viewdraggedpositive=false
              }
          }
       }
          
       ListModel{id: newsModel}

       WorkerScript {
              id: newsWorker
              source: "qrc:/js/newsworker.js"
          }
       
       BusyIndicator{
         id: newsBusy
         anchors.horizontalCenter: parent.horizontalCenter
         anchors.top:parent.top
         anchors.topMargin: 2*mm
         width:10*mm
         height: 10*mm
       }
       Rectangle{
          id:downloadNotice
          property alias text: noticeText.text
          color:"white"
          border.color:"grey"
          z:1
          anchors.horizontalCenter: parent.horizontalCenter
          anchors.bottom:parent.bottom
          anchors.bottomMargin: 2*mm
          width: noticeText.width+2*mm
          height: noticeText.height+2*mm
          visible: (downloadNotice.text!="")
          
          Text{
              id:noticeText
              color: "grey"
              anchors.centerIn: parent
              width: contentWidth
              height: contentHeight
              font.pixelSize: 2*mm
              text:""
          }
       }

        Component.onCompleted: {
            //print(newsSwipeview.stacktype);
            root.newstypeSignal.connect(newstypeHandling);
            root.messageSignal.connect(onFriendsMessages);
            root.contactdetailsSignal.connect(showContact);
            root.newsSignal.connect(showNews);

            try{newsModel.clear()} catch(e){}
            swipeIndicator.visible=true;
            newsSwipeview.height=rootStackItem.height-12*mm;
            newsSwipeview.y=5*mm;
            rootStackItem.state=""
            login.hasOwnProperty("newsViewType")?newstab.newstabstatus=login.newsViewType:"Conversations"
            var messagetype=0;
            switch(newsSwipeview.stacktype){
                case "Home":messagetype=0;break;
                case "DirectMessages": messagetype=1;break;
                case "Notifications":messagetype=2;break;
                case "Replies":messagetype=3;break;
                default:messagetype=0;
            }
            if((login.newsViewType=="Conversations")&&(newsSwipeview.stacktype=="Home")){
                Newsjs.chatsfromdb(db,login,messagetype,function(dbnews,lastid){
                    lastnewsid=lastid;
                    showNews(dbnews);
                })
            }
            else{Newsjs.newsfromdb(db,login,messagetype,function(dbnews,lastid){
                lastnewsid=lastid;
                showNews(dbnews)
             })}
            //}
        }
    }
}